165113131 has 2 divisors, whose sum is σ = 165113132. Its totient is φ = 165113130.

The previous prime is 165113107. The next prime is 165113149. The reversal of 165113131 is 131311561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165113131 - 2¹³ = 165104939 is a prime.

It is a super-2 number, since 2×165113131² = 54524692057246322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165113171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82556565 + 82556566.

It is an arithmetic number, because the mean of its divisors is an integer number (82556566).

Almost surely, 2^165113131 is an apocalyptic number.

165113131 is a deficient number, since it is larger than the sum of its proper divisors (1).

165113131 is an equidigital number, since it uses as much as digits as its factorization.

165113131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 22.

The square root of 165113131 is about 12849.6354422995. The cubic root of 165113131 is about 548.6059804736.

Adding to 165113131 its reverse (131311561), we get a palindrome (296424692).

The spelling of 165113131 in words is "one hundred sixty-five million, one hundred thirteen thousand, one hundred thirty-one".